Britain's Most Evil Killers

When police investigated Adam Whelehan for the murder of Natalie Jarvis, they uncovered a deadly plot fuelled by cowardice, cruelty and misogyny.

When 16-year-old Mhairi Julyan was killed, detectives used cutting edge forensics before closing in on Gavin McGuire - a repeat sexual offender.

Across three countries, over four decades, Robert Howard preyed on vulnerable women leaving two teenage victims dead.

Mary McLaughlin's violent death haunted Glasgow detectives, with no witnesses and no forensic leads - but new techniques revealed a killer.

Three victims murdered, a string of robberies and a killer with nothing to lose - can the police catch Anthony Russell before he strikes again?

10 years after Laura May Al Shatanawi met Hassan in Egypt, she was the devoted mother of a little boy - but she vanished without a trace.